{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         \\
\hline
S=1 $\times$ T=1&    0.008         &   -0.076         &   -0.124\sym{**} &   -0.246\sym{**} \\
                &  (0.076)         &  (0.122)         &  (0.049)         &  (0.098)         \\
S=1 $\times$ T=1 $\times$ electoral\_period=1&   -0.193\sym{**} &   -0.255\sym{*}  &                  &                  \\
                &  (0.091)         &  (0.151)         &                  &                  \\
S=1 $\times$ T=1 $\times$ term\_limit=1&                  &                  &    0.094         &    0.153         \\
                &                  &                  &  (0.063)         &  (0.125)         \\
\hline
Observations    &    16213         &    16181         &    16443         &    16410         \\
\(R^{2}\)       &    0.231         &    0.235         &    0.228         &    0.232         \\
\hline\hline
\end{tabular}
}
